Yes he is right that, in general, fruit has the lowest amount of anti-nutrients and irritants in it compared to other plant parts that are more heavily defended. I don't exclude green veg or roots from my diet because I think they are trying to kill me as Chaffee would say. I just don't like them. Fruit is the only plant food I ever missed.
I've gone though various degrees of strictness over the 10 (almost 11) years I have been carnivore. I've been at a stable healthy weight without even trying for years now. And my epilepsy went away. I don't have any auto immune issues with things like spices and tea but I realize that some people do. The things that really bother me are all of the plant babies (grains, nuts, seeds, legumes) all of the nightshades, bulbs like onions and garlic and anything that involves too much fiber.
You said you occasionally eat a salad in social situations. To me that feels like eating hay. I could eat it but why would I? I think I've been doing this long enough that I really don't give flying fig about what anyone thinks if I say, "Hold the bread, salad, and mac'n'cheese, Bring me two slabs of ribs."